While I say radar, it is doubtful that they do more than eyeball speeders leaving the University during school zone hours, which I believe is 2:30-3:45, even though you rarely see children there at ANY time of day. There are two signs, one on each side of the street, but they are obstructed by trees. Be on the lookout for a police cruiser with its trunk open (a very effective disguise, judging by how many tickets they write per day). Cop will jump into the street to get you no matter what side you are on, and anything over 25 is liable to get you pulled over. No way to talk him out of it, and he will most likely seize your license if you are going 30 or over. Remember, its a school zone so fine is ridiculous, and you have to go about 2-5 weeks with only a paper ticket as your license (quite embarassing!)